Capillary wave, a ripple along the interface of two fluids
Polarization ripples, appearing after irradiation of a solid by energy flux (laser, ions…)
Ripple marks, as identified in sediments and sedimentary rocks
Ripple (payment protocol), an open-source protocol for a payment system and distributed currency exchange.
USS Ripple, the name of more than one United States Navy ship
Ripple was a well-known brand of low-end fortified wine

Cryptocurrency

A cryptocurrency (or crypto currency) is a medium of exchange using cryptography to secure the transactions and to control the creation of new units. Cryptocurrencies are a subset of alternative currencies, or specifically of digital currencies. Bitcoin became the first decentralized cryptocurrency in 2009. Since then, numerous cryptocurrencies have been created. These are frequently called altcoins, as contraction of bitcoin alternative.
Cryptocurrencies typically feature decentralized control (as opposed to a centralized electronic money system, such as PayPal) and a public ledger (such as bitcoin’s block chain) which records transactions.